Agree, though to address the issue that the shuttle is too slow, by standing at the back line, using a drive action and still not reaching the minimum correct distance marker, it is hard to argue that the shuttle is not too slow. At that point my opponent must demonstrate to me that by standing behind the line, using a 'reasonable' motion, that it lands past the minimum marker. Often they cannot do so, which means at my level the shuttle is too slow and should be changed for a faster speed. If they use a non-standard motion to muscle it into the boundary, I still normally accept it as long as they contact it from behind the rear line and it's not an overhead action (not seen that yet though). You can make the argument that the shuttle is too slow in this fashion. Obviously it's much harder for me to argue the shuttle is too fast, but that is actually rarely a problem for me in the UK. It happens, but normally a fast shuttle puts off my opposition more than me, whatever the reason (i'm normally ok to play with a faster shuttle that lands on the rear line). If I do feel it's WAY too fast, then my own speed test will have it landing 50cm+ beyond the back line, which is far even by using a drive action.